package Demo01;

public class Test {
    public static void main(String[] args) {
        int[] arr = {1,2,3};
        
    }
}

class Animal {
    public void run() {
        System.out.println("跑");
    }
    Animal(int age, int height) {
        this.age = age;
        this.height = height;
    }
    public int age;

    public int height;
}